Szavay, the world number 32, who had beaten Dementieva in their only previous encounter, started well, breaking her in the fourth game and then holding serve to open up a 4-1 lead.

Mixing drop shots with fierce crosscourt backhands, Szavay moved the Russian around the court.

Dementieva quickly recovered to break back and level 4-4. The Hungarian carved out a set point at 6-5 which she wasted, whipping a backhand into the net before the Russian grabbed the set in the tie break.

Dementieva never looked back, steamrolling through the second set and dropping just one game.

World number four Jelena Jankovic from Serbia needed more than two hours and three sets to beat rapidly rising German talent Sabine Lisicki 7-5, 5-7, 6-3.

Fifth-seed Svetlana Kuznetsova from Russia came from a set down to beat China's Lina 4-6, 6-4, 7-5 with the Russian clinching a crucial break at 5-5 in the third to serve out the match.

Eighth-seed Agnieszka Radwanska from Poland had little trouble against Bulgarian qualifier Tsvetlana Pironkova easing 6-3, 6-3 into a last eight encounter with Safina.